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Mint kept mouse alive, but not in the basement… http://www.americanscientist.org/issues/id.800,y.1998,no.6,content.true,page.1,css.print/issue.aspx "the injury which is continually done to the atmosphere by the respiration of such a large number of animals... is, in part at least, repaired by the vegetable creation" Joseph Priestly, 1771-1772 http://home.nycap.rr.com/useless/priestly/priestly.html

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Here’s an animation of photosynthetic electron transport. http://www.colorado.edu/ebio/genbio/10_17LightReactions_A.html “When sunlight is absorbed into a plant, it triggers a chain reaction of electrons, which move from one molecule to the next… The Berkeley researchers borrowed this [chain reaction] for their artificial forest, but instead of relying on the pigment in chloroplast to trigger electron movement they used semiconductors.”

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When H2O varies: Light, CO2, H2O, (nutrients) Travelsfy.com; minnestota.publicradio.org; mccullagh.org CO2 H2O O2 In wet environments Stomata can stay wide open CO2 is relatively unlimited in plant cells In semi-arid environments Stomata are kept ajar to reduce water loss CO2 is acquired more slowly In dry environments Stomata are kept closed in the heat of the day Stomata are opened at night to acquire CO2

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When H2O varies: Light, CO2, H2O, (nutrients) Travelsfy.com; minnestota.publicradio.org; mccullagh.org In wet environments Stomata can stay wide open CO2 is relatively unlimited in plant cells In semi-arid environments Stomata are kept ajar to reduce water loss CO2 is acquired more slowly In dry environments Stomata are kept closed in the heat of the day Stomata are opened at night to acquire CO2 “C3” Most plants More “C4” plants Many grasses More “CAM” plants Cacti, many other desert succulents